Valve-grinding tool



J. J. RISCHARD.

VALVE GRINDING TOOL.

APPLICATION FILED NOV. 11, 1919.

1,377,440. ed May 10, 1921.

7 I: Au-Y? 5 l2 /NVNT0I? JOSEPH J./?Isc'HA o I fication.

. JosErrr nrsoHAnn, or rAsAnENA, c moama VALVE-GRINDING moon.

Specification of Letters iPatent.

Applicationhfiled November 11, 1919. Serial No; 337,326.

T0 ZZZ whom itmy concern: a

Be it known that. LJosnrn J RISQHARD, a citizen of the United .States,resid1ng at Pasadena, in the county of Los Angeles and-State of California, have invented new and useful Improvements in Valve-Grinding Tools, of which the following is a spec 1 This invention relates to mechanics hand tools and particularly to valve grinders and hasforits object to provide a valve grinder having means to be interlocked \i with the sockets usually. provided inthe h an embodiment of which head of the valve andhaving a stem 0on nected to saidmeans andcapable of angu lar movement relative to the valve that is engaged andto be oscillatedonits seat so as to facilitate the grinding of valves that are so located as to be diflicultof access; and V the invention consists of the construction, is illustrated in the accompanying drawing and described and claimed herein.

Figure l is a side elevation of the improved tool showing it as applied.

Fig. 2 is asideelevation in a plane at right angles to Fig. 1 showing certain of the parts in section. Fig. 3 is a sectional view on line 33 of Fig. 2. a v

', The present invention comprises a handle or knob form 2 in which is rotatably supported a stem 3 here shown as having a sliding sleeve 4, the stem and the sleeve being so constructed that upon relative movement longitudinally the stem. will be rotated, and such parts are here shownas respectively provided with a spiral groove '3 to be engaged by a complementary spiral thread 4. member 4:.

' Mounted by suitable connections upon the lower end of the stem 3 is a block or member 5 here shown in the form of a disk having diametrically opposite pivots 6-6 which engage in a ring 7 so that the block or disk 5 can oscillateon its fulcrums 6 in the ring, the latter being pivotally connected to the device 8 mounted or formed upon the lower end of the stem 3 and which connects the member 5 to the stem. This form of double pivot connection, commonly known as a gimbal bearing permits of the rotation of the stem 3 when it is disposed in an angular relation with respect to the axis-of the disk or block 5.

in the sleeve or reciprocatingv A. further feature of the. invention com- 7 prises means projecting below the bottom face of the block or member 5 and adapted to engage orinterlock with. the valve head V, such valve heads usually-being provided with'spanner such a wrench is inserted the valve head V canbe oscillated to grind it to its seat in the-usually well known manner.

It is desirable to provide for a substantial interlocking valve head, and the interlocking means I prefer toform as proiecting pinsor dog's llwhich may have a reduc d neck and pro videdwith a biting edge or flange 12,-these Patented May 10, 1921.

wrench sockets lose that when of the member 5 to the a g pted to firmly frictionally engage the surface of 10 when the'pins'or dogs llare advanced or ad ustedi downwardly from the face of the member 5. To accomplish substantial the walls of the sockets frictional interlock the dogs 11 are shown as provided with 13 to take into complementary threaded holes 1d that are obliquely disposed with relation to the vertical axis of the member 5 the lower ends of the dogs diverging so that as they are screwed downwardly the biting ends 12will relatively separate and thus firmly im inge upon the walls of the sockets in which they are inserted. It will be seen that this adjustabledogs provides fortheir adaptation and ready adjustment for tight'bind ing engagement with and upon valve heads 0 different sizes and in which the sockets 12 may be differently snaced.

Since the biting dogs 11 are arranged substantially on a member 5 as shown sirable to steady the carrying member 5 method of mounting the diametrical' line in the in Figs. 2 and 3, it is dethreaded body portions after the dogs have been interengaged with thevalve head and to that end I provide a suitable abutting device shown as comprising a pairv of set or abutment screws 15 arranged in a diameter of the block 5 at right angles to the diameter in which the screw holes 14 are arranged. From this it will b seen that tipping of the block with head V on the points will be eliminated and] the valve head securely locked with relation respect to the valve of the flanges 12 to the block 5. I N

The operation of the device is that when the handle 2 is held in one hand and the sleeve 4 reciprocated thereon after the proper connection has been made of the b1ook'5 withthe valve head v, then the ste i 3' will be oscillatedalternatelyin reverse d1- I miti the stem to an angle with resp having obliquely disposed rections withthe to and fro'movement of the driving sleeve 4 and the valve ground as usual to its seat in location, as the case may be.

The advantage of'the plvotal connection between the dog carrying member and vthe operating shaft or stem 3 is that the latter can be held at an angle with respect to the axis of the valve head and the latterstill eificiently oscillated. V Various changes may be made without departing from the, spirit of my invention as claimed. V '7 a I claim V v '1. A valve grinder comprising a stem or handle connected for relative rotation and means for'rotatingthe stem, a valve head engaging member, and a flexible connection between said member and the stem to perbe held and manipulated at 'ectto the axis of the valve engaged by said member,

dogs adjustable in the sockets of the valve head. V '2. A valve grinder comprising a member having a pair of dogs with tips adapted to member an actuating stem V and a gimbal connection between said memthe engine head or other 7 member,

the said member I enter the sockets of a valvehead, said dogs divergentlyandadjnstably arranged in said for the member;

ber and'stem. i

V 1 3..A valve grinder comprising a member having a pair of dogs with tips adapted to enter the socketso f a valve head, said dogs divergently and adjustably arranged insaid and stop screws when it is attached by} the dogs to the valve head. r

4. A valve a stem attached thereto, ablock pivotally attached tothe handle, divergent dogs threaded in the block and adapted to interlock with the socket walls of avalve 'head,land

an actuating stem forithe 'member, for steadying saidmember grinder comprising a handle, a stem attached thereto; a block pivotally attached to the handle, and divergentidogs abutment screws inth block tosteadythe applied member.

In testimony whereof l have signed'mv name to this .s ecificatiom osnrn J. Riemann; 

